Leslie Visits Her Garden to Discover Her Tomatoes and Beans

Leslie visits her garden to discover her tomatoes and beans have been eaten by an animal. Certain it's a deer, she constructs a fence around the garden. A week later, the vegetables have been eaten again, so she installs an even taller fence. Leslie has not considered she may have actually fenced in the offending creature likely because

A) she has ascribed too much utility to her initial solution.
B) an availability heuristic has blocked her from considering another hypothesis.
C) she did not apply logic before problem solving.
D) her original proposition was based on a false premise.